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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 | /* smp.h: Sparc specific SMP stuff. * * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu) */ #ifndef _SPARC_SMP_H #define _SPARC_SMP_H #include <linux/tasks.h> #include <asm/head.h> #include <asm/btfixup.h> #ifndef __ASSEMBLY__ /* PROM provided per-processor information we need * to start them all up. */ struct prom_cpuinfo { int prom_node; int mid; }; extern int linux_num_cpus; /* number of CPUs probed */ #endif /* !(__ASSEMBLY__) */ #ifdef __SMP__ #ifndef __ASSEMBLY__ #include <asm/ptrace.h> #include <asm/asi.h> extern struct prom_cpuinfo linux_cpus[NR_CPUS]; /* Per processor Sparc parameters we need. */ struct cpuinfo_sparc { unsigned long udelay_val; /* that's it */ unsigned short next; unsigned short mid; }; extern struct cpuinfo_sparc cpu_data[NR_CPUS]; extern unsigned long cpu_offset[NR_CPUS]; /* * Private routines/data */ extern int smp_found_cpus; extern unsigned char boot_cpu_id; extern unsigned long cpu_present_map; typedef void (*smpfunc_t)(unsigned long, unsigned long, unsigned long, unsigned long, unsigned long); /* * General functions that each host system must provide. */ void sun4m_init_smp(void); void sun4d_init_smp(void); void smp_callin(void); void smp_boot_cpus(void); void smp_store_cpu_info(int); int smp_bogo_info(char *buf); int smp_info(char *buf); BTFIXUPDEF_CALL(void, smp_cross_call, smpfunc_t, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long) BTFIXUPDEF_CALL(void, smp_message_pass, int, int, unsigned long, int) BTFIXUPDEF_CALL(int, __smp_processor_id, void) BTFIXUPDEF_BLACKBOX(smp_processor_id) BTFIXUPDEF_BLACKBOX(load_current) #define smp_cross_call(func,arg1,arg2,arg3,arg4,arg5) BTFIXUP_CALL(smp_cross_call)(func,arg1,arg2,arg3,arg4,arg5) #define smp_message_pass(target,msg,data,wait) BTFIXUP_CALL(smp_message_pass)(target,msg,data,wait) extern __inline__ void xc0(smpfunc_t func) { smp_cross_call(func, 0, 0, 0, 0, 0); } extern __inline__ void xc1(smpfunc_t func, unsigned long arg1) { smp_cross_call(func, arg1, 0, 0, 0, 0); } extern __inline__ void xc2(smpfunc_t func, unsigned long arg1, unsigned long arg2) { smp_cross_call(func, arg1, arg2, 0, 0, 0); } extern __inline__ void xc3(smpfunc_t func, unsigned long arg1, unsigned long arg2, unsigned long arg3) { smp_cross_call(func, arg1, arg2, arg3, 0, 0); } extern __inline__ void xc4(smpfunc_t func, unsigned long arg1, unsigned long arg2, unsigned long arg3, unsigned long arg4) { smp_cross_call(func, arg1, arg2, arg3, arg4, 0); } extern __inline__ void xc5(smpfunc_t func, unsigned long arg1, unsigned long arg2, unsigned long arg3, unsigned long arg4, unsigned long arg5) { smp_cross_call(func, arg1, arg2, arg3, arg4, arg5); } extern __volatile__ int cpu_number_map[NR_CPUS]; extern __volatile__ int __cpu_logical_map[NR_CPUS]; extern unsigned long smp_proc_in_lock[NR_CPUS]; /* As idle task checks need_resched in a tight loop, it is not necessary to wake it up. -jj */ #define smp_send_reschedule(cpu) do {} while (0) extern __inline__ int cpu_logical_map(int cpu) { return __cpu_logical_map[cpu]; } extern __inline__ int hard_smp4m_processor_id(void) { int cpuid; __asm__ __volatile__("rd %%tbr, %0\n\t" "srl %0, 12, %0\n\t" "and %0, 3, %0\n\t" : "=&r" (cpuid)); return cpuid; } extern __inline__ int hard_smp4d_processor_id(void) { int cpuid; __asm__ __volatile__("lda [%%g0] %1, %0\n\t" : "=&r" (cpuid) : "i" (ASI_M_VIKING_TMP1)); return cpuid; } #ifndef MODULE extern __inline__ int hard_smp_processor_id(void) { int cpuid; /* Black box - sun4m __asm__ __volatile__("rd %%tbr, %0\n\t" "srl %0, 12, %0\n\t" "and %0, 3, %0\n\t" : "=&r" (cpuid)); - sun4d __asm__ __volatile__("lda [%g0] ASI_M_VIKING_TMP1, %0\n\t" "nop; nop" : "=&r" (cpuid)); See btfixup.h and btfixupprep.c to understand how a blackbox works. */ __asm__ __volatile__("sethi %%hi(___b_smp_processor_id), %0\n\t" "sethi %%hi(boot_cpu_id), %0\n\t" "ldub [%0 + %%lo(boot_cpu_id)], %0\n\t" : "=&r" (cpuid)); return cpuid; } #else extern __inline__ int hard_smp_processor_id(void) { int cpuid; __asm__ __volatile__("mov %%o7, %%g1\n\t" "call ___f___smp_processor_id\n\t" " nop\n\t" "mov %%g2, %0\n\t" : "=r"(cpuid) : : "g1", "g2"); return cpuid; } #endif #define smp_processor_id() hard_smp_processor_id() #endif /* !(__ASSEMBLY__) */ /* Sparc specific messages. */ #define MSG_CROSS_CALL 0x0005 /* run func on cpus */ /* Empirical PROM processor mailbox constants. If the per-cpu mailbox * contains something other than one of these then the ipi is from * Linux's active_kernel_processor. This facility exists so that * the boot monitor can capture all the other cpus when one catches * a watchdog reset or the user enters the monitor using L1-A keys. */ #define MBOX_STOPCPU 0xFB #define MBOX_IDLECPU 0xFC #define MBOX_IDLECPU2 0xFD #define MBOX_STOPCPU2 0xFE #define PROC_CHANGE_PENALTY 20 #define SMP_FROM_INT 1 #define SMP_FROM_SYSCALL 2 #endif /* !(__SMP__) */ #define NO_PROC_ID 0xFF #endif /* !(_SPARC_SMP_H) */ |